Piston-ring remover



Aug. 31., 1926.

J. KLEIN .PI-STON RING REMOVER Filed June 25, 1925 Q V I 3m 1 Juan KZen Patented Aug. 31, 1926.

stares setse i JUAN KLEIN, OF BUENOS AIR-ES, ARGENTINA.

PISTON-RING REMOVEE.

Application filed June. 25, 1925, Serial No. 39,589, and in Argentina May 28, 1925.

The subject-matter of the present invention is a piston ring removing tool, as the name implies, this is a tool designed to facilitate removal of piston rings from the pistons of internal combustion engines,v steam engines, compressors and generally and when removed from the piston.

Usually the mounting of piston rings gives no trouble at all, it being sufficient to spring them open to a sufiicient extent to permit placing them over the piston head, whence they may be easily pushed down until they locate themselves in their corresponding groove. The extraction of the rings from their grooves, however, has always been a cumbersome operation, it being necessary from time to time in order to thoroughly cleanse the piston, or for the purpose of replacing the piston rings with new ones if they are worn out through continued use. If it is attempted to spring the rings open with the hands, it either happens that the joint slips inside the groove, or else remains completely outside the latter but leaving the opposed end enclosed therein, locking the ring within and preventing edgewise movement thereof; if too much force is applied in expanding the piston rings, the latter are frequently bent or broken, due to the plastic and brittle nature of their material. The extraction of the piston rings is thus left to the greater or smaller degree of skill on the part of the operator, being frequently carried out by the use of circumstantial means, i. e. by the appli cation of small bits of iron, screw drivers, or wires, as the occasion may offer, in order to hold the piston rings in open position to a slip them past the edges of their grooves.

Obviously, much as the person engaged in removing the piston rings may be skilled in handlingthis work, the occasional breaking of piston rings or damages caused to the piston itself by way of scoring and wear of the edges, apart from the loss of time involved in the operation,- is unavoidable.

In order to do away with the vaforementioned troubles and provide a device appro priate for lifting the rings oil the pistons without difficulties, promptly and without causing damages of any kind either to the rings or to the piston, I have devised thepiston ring remover forming the subjectmatter of the present invention, which by its simplicity and ease of operation not only is destined to constitute a valuable assistant in assembling and repair shops, but also to form part of theequipment of the motorist, motorcyclist, and any placewhere internal combustion or steam engines, compressors, or pumps are installed, such as factories, power plants, water craft, &e.

In order that the invention may be more clearly understood, it has been illustrated in the annexed drawings forming part of the present specification, wherein Figure 1 is a perspective view of the piston ring remover according to the invention.

Figure 2 is atop plan view of the same, applied to a piston with the purpose of removing one of the piston rings.

Figure 3 is an elevation of an automobile piston, to the head of which the device according to this invention is applied while removing the first of the piston rings.

Figure 4 shows the piston ring remover, lifted off the piston and showing the remov al of the piston ring.

Referring to Fig. 1 of the drawings, the piston ring remover includes an annular body a, provided at one portion of its external periphery with two curved handles or lugs Z), Z), in fixed position. The internal periphery of. the annular body a, facing the lugs b, I), carries a segmental elevated portion 0 diametrically and symmetrically facing this internal segment 0, the internal periphery of the annular body a carries another segmental elevated port-ion cl, comprising a smaller angle than the first mentioned portion. The internal face of segment cl carries fastened thereto a steel blade 6 projecting towards one side of body a in an axial direction.

The two portions of body a comprised between the sides of segments 0 and all are split by the slots 7, 7, having mounted therein the sliding segments 9, g, which may slide from their initial position, where they are close to segment d, to the extreme position where they are set close to segment 0, one at each side of the latter.

These'sliding segments are located in the internal periphery of annular body a each ject in axial direction towards the same side being provided with a small steelblade h, h, respectively, similar to blade 6 referred to above. The thickness of segments g, g is the same as that of the fixedsegments d and c, and the respective blades it, h, proas the wider blade 6. The position of each of segments 9, 9, may be controlled from the outside by means of the lugs a", projecting through the respective slots f, f, being prei' 'ented from falling inwardly of the annular body aby the locking pins j, y

driven through said lugs. In order to provide for a smooth and sliding movement of the slides through the slots, each lug z, z

carries, interposed, between the locking pins fton ring remover according 'to the invention,

as applied to the head of apis'ton l, for the purpose of removing one of the rings. This figure discloses most of the parts indicated in the preceding drawing in profile.

set close to the segmental portion 41. -The internal circle comprised between the sege mental portions 0, d, 19, and g, is corresponding to substantially the external diameter of the piston from which the rings are to be removed. In the initial position of the movable segments 9, g", the projecting steel blades h, 711 are set close to the fixed blade 6, and in this position the three blades, h, e, and it, may be inserted togetherbetween the piston ring m and the wall of the piston Z. To this end, the blade 0 is inserted so it is located beneath: the joint of the piston ring in order to prevent the ends of this joint from closing. due to theirgresiliency. (See Fig. 3); After inserting the three blades'benea'th the piston ring, the leftlhand thumb is placed against the fixed front lug :Z) and the novable lug {is gripped by the left hand forefinger; in the same inaner the righthand thumb is placed against the front lug Z2 and the movable lug-i is gripped by the right hand forefinger, simultaneously applying pressure against the lugs, 7}, i, pullingthem in the direction ofthearrows (see Fig. 2, towards the respective fixed lugs b, 1) thus placing the-segmentsg, 9 close against the segmental fixed portion a.

Inasmuch as "the steel blades h, if on the movable segments g,=g are inserted beneath the piston r ng m, these blades slide during the movement of said segments beneaththe piston ring, untilattaining-with regard to the fixed blade c-and to each other, an ap-, proximate distance of 120 degrees, leaving As may be seen from the drawing, thetool has its slidesg, 0 in the initial position, i. e.

"the piston ring We suspended between three points (see Figure Q'). In such position,

the piston ring is expanded under uniform the piston Z, carrying'the ring m suspended on its blades it, c and h. This is the position shown in Fig 3, disclosing clearly the expansion of the suspended piston ring, which may beseen by the increased diameter oi the latter and by the widened gap at the center.

b After lifting the piston ring remover ofi piston Z, the piston ringm may be easily slipped off the implement, by pushing it, thus leaving the implement ready to be used over again. I

I claim as my invention:

1. Piston ring removing tool for pistons of all kinds equipped with metal rings, comprising an annualr body including in its internal periphery segmental elevated portions, the internal circle comprised between said segments corresponding substantiallyto the external periphery of the piston with which th said tool "is to be used; a segmental blade fastened to one of said segmental projections, a plurality 'pojs'ition along the periphery of said annular body, at points substantially equidistant with regard to said fixed blade and to each other, I for the purpose "of expanding the piston ring leaving the latter uniformly suspended thereon to extract "said piston ring from "its groove and bringing it'clear ill) of the piston walls, :in order to permit its removal without trouble and without causing damages to either the piston or the piston itself. I Y 7 y '2. Piston ring removing tool for pistons of allkinds equipped with metal rings, in accordance with claim N0. -1, characterized by the provision of fixed lugs on the "external periphery of the annular body,'in

order to facilitate actuating the movable blades. q y

3. A piston ring remover comprising-an annular body a dapte'dto fit over a piston;

means onsaid-body adapted to be inserted between 'the ;piston ring at theend thereof and the piston; :andmeans for expanding the ring from the ends thereo'f'toward the intermediate section untilthe ring is clear of its respective groove so that it may be removed over the piston with the annular body, said second means being slidably mounted on said body.

t. A piston ring remover comprising an annular body adapted to fit over a piston; a'blade secured to the body; and a second lade slidably mounted on said body, said blades being adapted to be inserted under the ends of the piston ring so that upon L- movement of the second blade toward the intermediate section of the ring until the ring is clear of its respective groove the ring may be removed over the piston together with the annular body.

A piston ring remover comprising an annular body adapted to fit over a piston; a blade secured to the body; and a pair of blades slidably mounted on said body on each side of said first-named blade, said blades being adapted to be inserted under the ends of the piston ring so that upon movement of the slidable blades toward the intermediate section of the ring until the ring is clear of its respective groove, the ring may be removed over the piston together with the annular body,

6. A piston ring remover comprising an annular body adapted tofit over a piston and having slots therein; a blade secured to the body; and a pair of spring-pressed blades slidably mounted in the slots of the body one on each side of said first-named blade, said blades being adapted to be inserted under the ends of the piston ring so that upon movement of the springpressed blades toward the intermediate section of the ring until the ring is clear of its respective groove, the ring may be removed over the piston together with the annular body.

7. A piston ring remover comprising an annular body adapted to fit over a piston and having slots therein; a blade secured to the body; and a pair of spring-pressed blades slidably mounted in the slots of the 1.

body one on each side of said first-named blade said blades being adapted to be in serted under the ends of the piston ring so that upon movement of the spring-pressed blades toward the intermediate section of the ring until the ring is clear of its respective groove, the ring may be removed over the piston together with the annular body; and means for aiding the actuation of the spring-pressed blades.

In testimony whereof I aflix my signature.

J UAN KLEIN. 

